Weather in Aveiro in October

A good month. October works. It is not the peak, but nothing about it fights you. Highs average 21.9 °C, lows 14 °C, and rain falls on 13 days — nothing in the month is working against you.

October ranks 6 of 12 in Aveiro: past the worst of the year but short of July, which is the month to book if the dates are open.

This is wet-season rain: 13 wet days and 5 genuinely heavy ones, which in this climate means concentrated downpours rather than all-day grey. The pattern is usually a clear morning and a loud afternoon, so front-load the day and stop fighting the 3pm hour. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average October reaches 30 °C. Across the twenty years measured, the hottest October day reached 33.2 °C and the coldest night fell to 7.5 °C, and the wettest single day dropped 56 mm — roughly 44% of the month's rain in one day.

October is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest October on record still delivered 215 mm against 19 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 127 mm average is a reasonable planning figure, not a promise.

Wind is light at 5.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 77%, high enough to notice on the warm days without dominating them.

How October sits in the year

The month is on the way down: 3.8 °C cooler than September, with November dropping another 5 °C. The first week and the last are not the same trip. Rain has already shifted: 7 days more than September had.

Daylight in October

11.2 hours of daylight, losing 1.3 hours across the month. That is between Aveiro's extremes of 15.1 and 9.3 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 18 °C in October — swimmable, but it takes a moment to commit. The sea peaks at 18.5 °C in August and bottoms out at 13.7 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

October in Aveiro versus nearby

If Aveiro is one option among several, the nearby comparison is worth making. Leiria is close enough to be a coin toss — within a degree on temperature, 2 days less rain. Braga is close enough to be a coin toss — within a degree on temperature, the same number of rain days.

So: October is a compromise. July is 25 points better and is what Aveiro is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Aveiro

See all twelve months in Aveiro, or where else to go in October.